A $2\mathrm{.}54$ m tall container is filled to the brim partway with mercury and the rest of the way with water. the container is open to the atmosphere. What must be the depth of the mercury so that the absolute pressure on the bottom of the container is twice the atmospheric pressure? Hint: Let the depth of the mercury be y$.$ Calculate the total pressure of water and mercury and set their sum to te increase in pressure at the bottom$($from atmospheric pressure$)$